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Posts: 56

# Logit odds missing valuer

logit(p)== b0 + b1x1.

If x1 value is missing. what will be the value of the odds? Missing or some value?

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Solution
‎11-27-2016 03:49 PM
SAS Super FREQ
Posts: 3,841

## Re: Logit odds missing valuer

The predicted value is missing for every observation in which any explanatory variable in the model is missing. The regression model cannot compute a predicted value (or a residual) when there is a missing value on the right-hand side of the  model.

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Super User
Posts: 20,765

Missing.

Super User
Posts: 10,217

## Re: Logit odds missing valuer

```
You mean a single x1 value is missing
or all the x1 value are missing ?

```
Contributor
Posts: 56

## Re: Logit odds missing valuer

Single x1 with rest of values

Super User
Posts: 10,217

## Re: Logit odds missing valuer

```If one single obs (x1) is not missing. SAS will remove that obs from fitting MODEL.
Therefore, ODDS should have a value .

```
Super User
Posts: 20,765

## Re: Logit odds missing valuer

@Ksharp you've assumed the OP is fitting a model, given the formula it could be a simple data step.

Either way the answer is missing. It would also be much faster to check this out than to ask.

Super User
Posts: 10,217

## Re: Logit odds missing valuer

```Sorry.
If one single obs(x1) is MISSING ......
```
Contributor
Posts: 56

## Re: Logit odds missing valuer

Hello Ksharp and Reeza!

Thanks for the explanation. Just to make it clear I am explaining this

The logistic regression equation is: (just an example

logit(p) = -4.48 + 0.11 x AGE + 1.16 x SMOKING

I am  asking for one below

logit(p) = -4.48 + 0.11 x AGE (Just one equation)

and if age value is missing ...what would be outcome?  0? or missing value? or some value

Sameer

Solution
‎11-27-2016 03:49 PM
SAS Super FREQ
Posts: 3,841

## Re: Logit odds missing valuer

The predicted value is missing for every observation in which any explanatory variable in the model is missing. The regression model cannot compute a predicted value (or a residual) when there is a missing value on the right-hand side of the  model.

Contributor
Posts: 56

## Re: Logit odds missing valuer

Thank you everyone for the help

☑ This topic is solved.